The four EuroLeague teams from Spain are reportedly against the resumption of the Liga Endesa season, according to Nova.rs.
Those teams are Real Madrid, FC Barcelona, Valencia Basket and Baskonia.
The Liga ACB has been planning to finish the season with a tournament and will look to decide whether to resume or cancel the season by the end of May.
On the other hand, if the EuroLeague season resumes, games will be played from July 4-26.
Barcelona recently returned to practice on May 13.
Real Madrid also has returned to practice.